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CVE-2026-44025— Fluentd: Exposure of Sensitive Information via Monitor Agent API

CVSS 7.5 · High EPSS 0.41% · P34

Possible ATT&CK Techniques 1AI

T1005 · Data from Local System

Affected Version Matrix 1

VendorProductVersion RangeStatus
fluentfluentd< 1.19.3affected
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I. Basic Information for CVE-2026-44025

Vulnerability Information
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Vulnerability Title
Fluentd: Exposure of Sensitive Information via Monitor Agent API
Source: CVE Program / CVE List V5
Vulnerability Description
Fluentd collects events from various data sources and writes them to files, RDBMS, NoSQL, IaaS, SaaS, Hadoop and so on. Prior to 1.19.3, Fluentd's Monitor Agent plugin in_monitor_agent exposes internal metrics and plugin information via a REST API, and responses from /api/plugins.json and related endpoints unintentionally include internal instance variables that may contain database passwords, API keys, or cloud credentials. This issue is fixed in version 1.19.3.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Fluentd 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Fluentd是Fluentd团队开源的一个开源日志收集器。从各种数据源收集事件,并将其写入文件、RDBMS、NoSQL、IaaS、SaaS、Hadoop等。 Fluentd 1.19.3之前版本存在授权问题漏洞，该漏洞源于Monitor Agent插件in_monitor_agent通过REST API暴露内部指标和插件信息，且/api/plugins.json及相关端点的响应中意外包含可能含有数据库密码、API密钥或云凭据的内部实例变量，可能导致信息泄露。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
fluentfluentd < 1.19.3 -

II. Public POCs for CVE-2026-44025

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium
Qwen3.6-35B-A3B · 6665 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-44025

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Patches & Fixes for CVE-2026-44025 (2)

Vendor Advisories for CVE-2026-44025 (1)

Vendor Pages for CVE-2026-44025 (1)

Same Patch Batch · fluent · 2026-07-08 · 4 CVEs total

CVE-2026-440249.8 CRITICALFluentd: Remote Code Execution (RCE) via Arbitrary File Write in `${tag}` Placeholder
CVE-2026-441607.5 HIGHFluentd: Denial of Service (DoS) via Gzip Decompression Bomb in `in_http` and `in_forward`
CVE-2026-441617.2 HIGHFluentd: Server-Side Request Forgery (SSRF) via Placeholder Expansion in `out_http`

IV. Related Vulnerabilities

Same product: fluentd
Same vendor: fluent
Same weakness: CWE-306

V. Comments for CVE-2026-44025

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